# Potassium from Potassium superoxide [closed]

Is it possible to get $$\ce K$$ from $$\ce K{O_2}$$ using a synthesis reaction? If yes, can you describe it?

• I suppose easier and/or cheaper ways are preferred. KO2 assumes it has (probably) already been K once. It is like to isolate K twice. // Attempts to post the most laconic question ever are at risk they will be closed and most users will not notice them. How do I ask a good question. Nov 24 '21 at 8:04
• $\ce{KO2}$ is a dangerous and explosive substance. Don't use it. Better destroy it in large amounts of water. Nov 24 '21 at 8:39

## 1 Answer

Thermal decomposition should help but it requires very high temperature. It goes through various oxides and ultimately decompose to potassium.

$$\ce{KO2 ->[<400 ^\circ C] non-stoichiometric oxides ->[400-480 ^\circ C] K2O2 ->[500 ^\circ C] K2O ->[560 ^\circ C] K (+oxygen ^)}$$

Do note the reaction is performed in vacuum otherwise it can oxidized back to peroxide/superoxide.

Ref. STUDIES OF THE THERMAL DECOMPOSITION OF THE POTASSIUM OXIDES IN THE TEMPERATURE RANGE 300--480 DEGREES C, RILEY, JOHN F. 1968. (link)